The national standard is that the content of erucic acid in oil is less than 5%, and the content of glucosinolates in cake is less than 30 μ mol/g. Those that meet these two standards can be referred to as high-quality rapeseed.
Double low rapeseed meal not only retains the high protein characteristics of rapeseed meal, but also greatly reduces the content of toxic components. Due to its advantages such as thin shell and low crude fiber content, it has become a rare source of protein feed in various animal feed in recent years, and is commonly used in aquaculture and ruminant feed!
Rapeseed cake and meal are by-products obtained by extracting oil from rapeseed, which are light grayish brown in color. The cake after pressing and extracting oil is called cake, and the meal after soaking or pre pressing and extracting oil is called meal. The crude protein content of rapeseed cake and meal ranges from 34% to 38%. The characteristic of amino acid composition is high methionine content (second only to sesame cake and meal), high lysine content, especially high digestibility of digestible sulfur-containing amino acids, and low arginine content. The effective energy value of rapeseed cake and meal is relatively low (with low starch content and difficulty in digesting and utilizing rapeseed shells). The content of calcium and phosphorus in minerals is high, and the content of selenium and manganese is also high, especially the selenium content is the highest among commonly used plant feed. However, rapeseed also contains anti nutritional components such as glucosinolates, erucic acid, tannins, and phytic acid, among which glucosinolates are the main ones.